The advantages of S.I. are as under :
(i) S.I. is coherent system of units, i.e., a system based on certain set of fundamental units.
(ii) S.I. is rational system of units. i.e., it assigns only one unit to a particular physical quantity.
e.g., for energy of any type, i.e., mechanical or heat or electrical. There is only one unit, Joule (J) but in M.K.S. system unit for mechanical energy is Joule.
(iii) S.I. is metric system, i.e., multiples and sub-multiples of the system can be expressed as a power of 10.
(iv) S.I. is internationally accepted system of units.
